Engine-muffler



L. J. MAR TEL. ENGINE MUFFLER. APPLICATION liaLED OCT. 13.1919.

1,354,334, Patented 001154920. I l y Km k f i X a v l 5 Q ,9 e 6 U (1) @224 mm; ll/zinesses. firms/liar.

- /ZQMQ Allorney PATENT OFFICE.

LEROY J. MAR/TEL, OF CENTRAL FALLS, RHODE ISLAND.

ENGINE-MUFFLER.

Specification of Letters Patent.

Patented Oct. 5, 1920.

Application filed October 13, 1919. Serial No. 330,486.

T 0 all whom it may concern Be it known that I, LEROY J. MARTEL, a citizen of the United States, residing at 22 Park street, Central Falls, in the county of Providence and State of Rhode Island, have invented certain new and useful Improvements in Engine-lllufflers, of which the following is a specification.

My invention relates to improvements in mufflers for gas or gasolene engines, or internal explosion engines, and is also applicable to the ordinary steam engine, and the urpose of my invention is to provide a mu er that will effectually silence the sound of the explosion or exhaust without creating back pressure, and in which the ingress and egress of the gases are adjustable from the outside of the muffler.

These objects are accomplished by the mechanism disclosed in the drawings accompanying this application, in which- Figure 1 is a vertical longitudinal section through the center of the muffler.

Fig-2, a vertical cross-section on the line A-A of Fig. 1, and

Fig. 3, a detail of the adjusting device.

The same letters refer to the same parts throughout the several drawings.

In Fig. 1, t represents the body of the muffler in the usual cylindrical form, having the heads 50-00 secured thereto by bolts or other suitable means. a represents the inlet from the engine, and w the outlet from the muffler.- d(Z' are two diaphragms within the body of the muffler perforated as shown with a plurality of holes ee'. Integral with the diaphragms (Z-d, and forming a portion thereof, is" a hollow cylinder m located near the central axis of the muffler. IVithin this cylinder m is located a plunger it, having a conical head c-adjacent to the inlet a. This plunger n is itself in hollow cylindrical form and Within it is placed with a sliding fit a second plunger 0 having the conical head 8 adjacent to the outlet w. (The plunger n slides easily within the cylinder m and the plunger 0 slides easily within the plunger n and each of the plungers is capable of movement independent of the other.

The inlet a terminates within the muffler in the cone-shaped orifice, or seat, I) and the outlet w at its inner end terminates in a similar cone-shaped receptacle u, the angles of b and at being the same as the respective angles of the cones 0 and s. In the plunger 12 is securely screwed the stem i which projects radially outward from said plunger and terminates in the head B; while the plunger 0 is provided with a similar stem 7L securely screwed to 0 and terminating without the muffler in the head B; and the slid ing movements of the plungers n and 0 are governed by these stems 71 and i.

The shell of the mufiler is slotted at 2"z' so as to permit the longitudinal movements of the stems ik and their respective plungers. In order to allow this longitudinal movement, the core or cylinder at is also slotted at g and r and the outer plunger 12 has a similar slot 10 for the movement of the stem h.

As the plungers n and 0 are capable of longitudinal movement within the mufiler, it is important that when a suitable position has been established for the cone-shaped heads 0 and 8 they should be capable of being fixed in position so as to prevent accidental moving. This fixation is secured by the device shown at g 2. seen best in section in Fig. 2. These members 1 and 2 consist of cylindrical or other suitably shaped blocks perforated for the sliding therein of the stems i and 72., and having serrated lower surfaces. Fixed upon the exterior 'of the mulller where the stems i and it come out are the members 7r-k which are in form superficially of a hollow rectangle fastened to the outer wall of the muffler as shown best in Fig. 3 and having upon the two longitudinal upper faces serrations fitting those of the blocks ?/2,' these blocks being equal in width to the transverse width of the members Zr7;"'. Between the heads B--B of the stems 'i-h and the upper surface of the blocks y-2 are the springs E-E operating to keep the blocks y2 in place after adjustment by means of the serrations aforesaid. I

y and 2, Fig. 2, are wings upon the blocks .2 by means of which these blocks may be disengaged from the serrations in 7ck when adjustment is being made and the springs EE force said blocks into the serrations when these wings are released. As the rectangular openings in lv-Jc would permit the escape of gases, the slides f are brought into any desired relation with the seats b@ and adjusted and fixed in posimeans of the stems 71-h with their respective heads. Any desired freedom of ingress and egress of the steam or gases is thus secured-and the respective heads 0-8 may be easily and readily adjusted so as to provide the highest possible efficiency in the mufHer.

In my drawing I have shown the stems emerging from the mufiler 180 degrees apart; in practice, however, these stems may be located at any desired angle with each other from 25 to 180 degrees.

lVhile I have shown the plungers as terminating in conical heads, this shape is not vital to the operation of my invention but I deem it the most efiicient form for said heads. Thus a spherical form of head may be used without departing from the principle of my invention. 1 The inner ends of the inlet and outlet must, of course, conform to the shape of the plunger heads.

Having now described my invention, what I claim and desire to secure by Letters Patent is 1. A muffler for engines consisting of a hollow receptacle having an inlet and an outlet; movable plungers located within the receptacle, said plungers being respectively adjustable in relation to their distance from said inlet and said outlet, and means for adjusting the same from the outside of the muffler, substantially as set forth.

2. A muffler for engines comprising a hollow receptacle having an inlet and an outlet; movable plungers located within the muffler and adjustable with respect to said inlet and said outlet, the heads of said plungers being adapted to conform to or fit into the inner ends of said inlet and outlet respectively; and means for adjusting said plungers from without the muffler, substantially as described.-

3. A muffler for engines consisting of a hollow receptacle having an inlet and an outlet; a movable plunger located within the muffler; the head thereof being adapted to fit or conform to the inner end of the inlet of said mufller and a like plunger having a head adapted-to fit or conform to the inner end of the outlet of said mufller; each of said plungers having a stem fixed therein and projecting therefrom outwardly through the external wall of the mufller, said stems serving to adjust the position of the plungers with reference to the inlet and outlet of the muffler, substantially as described.

4. A muffler for engines consisting of a hollow receptacle having an inlet and an outlet; a movable plunger located within the mufller, and having a head adapted to fit or conform to the inner end of the inlet of said mufller, and a like plunger having a head adapted to fit or conform to the inner end of the outlet of said muffler; each of said plungers having a stem fixed therein and projecting therefromoutwardly through the external wall of the muffler, said stems serving toadjust the position of the plungers with reference to the inlet and outlet of the muffler; and means for securing said plungers in any desired position within the mufiler, substantially as described.

5. A muffler for engines consisting of a hollow receptacle having an inlet and an outlet; a movable plunger located within the muffler; the head thereof being adapted to fit or conform to the inner end of the inlet of said muffler and a like plunger having a head adapted to fit or conform to the inner end of the outlet of said muffler; each of said plungers having a stem fixed therein and projecting therefrom outwardly through the external wall of the muffler, said stems serving to adjust the position of the plungers with reference to the inlet and outlet of the muffler; serrated members fixed upon the outside of said muffler adjacent to said stems; a movable block perforated by and sliding, one upon each of said stems, and having a serrated lower surface, and springs one upon each of said stems between the outer ends thereof and said blocks,.operating normally to fix and return said plungers in position and also to permit the adjustment thereof, substantially as described.

In testimony whereof I affix my signature in presence of two witnesses.

FREDERICK B. GRANT, EDITH M. BRo LEY. 

